// 设置响应头的中间件

module.exports = async (ctx, next) => {
  const contentType = 'application/json; charset=utf-8';
  ctx.set('Content-Type', contentType);
  ctx.set('Access-Control-Allow-Origin', "*");
  ctx.set('Access-Control-Allow-Methods', "OPTIONS, GET, PUT, POST, DELETE");
  await next();
}